Admiral is a crankybirdvillager that appears in Animal Crossing series titles until Doubutsu no Mori e+ and returns in Animal Crossing: New Leaf - Welcome amiibo. His name and initial quote are both sailing-related - admiral being a title given to the supreme commander of a ship, which are often stern and obstinate, in reference to his cranky personality. "Aye aye" is a phrase meaning "yes" or "yes sir", or further meaning "Yes, I have received the instructions, understood them, and will carry them out."
Admiral is a green bird with a white jaw line, orange cheeks, and a yellow-orange beak, often mistaken as an 'Angry Bird'. His overall appearance matches his cranky personality - with deep, serious eyes (which are slightly squinted in Welcome amiibo) complimenting a large black unibrow, and a protruding forehead making him appear mature or serious, which are two traits commonly associated with the cranky villager personality. His default umbrella is the Flame Umbrella.
Personality
Below is a brief description of the cranky personality. For more information, click here.
As a cranky villager, Admiral will appear serious and mature when in conversation, and not understand sarcasm or jokes, making it difficult for other personality types, namely peppy and jock types, to have a conversation with him without either villager walking off angry or upset. He prefers peace and solitude, therefore he is happier left alone but will eventually befriend the player considering them his "only friend". He enjoys fishing, and may give some advice towards the player about certain types of fish and how well they sell at Tom Nook's Store. He will admire lazy villagers due to their laid-back attitude. He will also get along with snooty villagers due to their similar personalities.
Every once in a while, you run into a guy who just likes being in a bad mood. Admiral is just that kind of guy. He's a complainer, and whenever he's not complaining, he's just being downright mean.